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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | José Ramírez# | 1.087 | 2025-2028 | |
| 2 | Júlio Estrada# | 1.077 | 2028-2030 | |
| 3 | Bob Simpson | 1.071 | 2015-2019 | |
| 4 | R.J. Richards | 1.057 | 2018-2022 | |
| 5 | Ramiro González# | 1.054 | 2025-2028 | |
| 6 | Deron Farrell | 1.047 | 2016-2020 | |
| 6 | Dennis Copeland | 1.047 | 2015-2019 | |
| 6 | Jorge Santos# | 1.047 | 2025-2028 | |
| 9 | Quincy Cullus# | 1.046 | 2025-2028 | |
| 10 | Trevor Nelson | 1.043 | 2018-2022 | |
| 10 | Marc Simpson | 1.043 | 2016-2020 | |
| 12 | Tom Gallagher | 1.038 | 2018-2022 | |
| 12 | Dave Lamm | 1.038 | 2016-2020 | |
| 14 | Shozo Tanaka# | 1.035 | 2027-2029 | |
| 15 | Stanton Chapman | 1.034 | 2015-2019 | |
| 16 | Xavier Downes# | 1.030 | 2024-2027 | |
| 17 | Fred Cunningham | 1.020 | 2018-2022 | |
| 18 | Sumiteru Yoshida# | 1.018 | 2025-2028 | |
| 19 | Michael Sizemore | 1.016 | 2016-2019 | |
| 20 | Greg Dodson# | 1.008 | 2027-2030 | |
| 21 | Jimmy Galilei | 1.007 | 2018-2022 | |
| 22 | Ron Cunningham | 0.999 | 2016-2020 | |
| 23 | Armando Morales# | 0.998 | 2024-2027 | |
| 24 | Ron Howe | 0.996 | 2015-2019 | |
| 25 | Adam Biga# | 0.995 | 2022-2024 | |
| 25 | Mitsukuni Shimizu# | 0.995 | 2026-2028 | |
| 27 | Kichisaburo Sano# | 0.994 | 2025-2028 | |
| 28 | Ewan Visser# | 0.990 | 2025-2027 | |
| 29 | Paul Orr# | 0.985 | 2025-2028 | |
| 30 | Raúl Peña# | 0.978 | 2027-2030 | |
| 31 | António Díaz# | 0.976 | 2026-2028 | |
| 32 | Vicente Romero | 0.966 | 2016-2020 | |
| 33 | Norberto Javier# | 0.965 | 2028-2030 | |
| 34 | Walt Cochran# | 0.956 | 2025-2028 |
